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Formation of protein bodies in the starchy endosperm of rice oryza sativa a reinvestigation



Formation of protein bodies in the starchy endosperm of rice oryza sativa a reinvestigation



Annals of Botany (London) 45(5): 503-510



The mechanism of protein body formation in the starchy endosperm was studied by EM for 2 rice varieties, one of normal protein content ('IR26') and the other high in protein ('IR480'). Three types of protein bodies were found in both rices. While each protein body type was deposited differntly, the mechanism of formation for the same type in the 2 varieties was analogous. First secreted was the large spherical protein body. It was deposited within the rough endoplasmic reticulum, had a dense center and a concentric ring appearance, and was bounded by a single membrane. The 2nd protein body to form was crystalline, was found in vacuoles, and was secreted via the Golgi apparatus. The 3rd type, the small spherical protein body, was secreted late in development, was deposited in the vesicular rough endoplasmic reticulum, and lacked dense centers and concentric rings. The high protein rice had a thicker sub-aleurone layer than the normal protein rice.

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Accession: 005481176

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